Search found 34 matches

by Elana Weingord 1C
Sun Jun 10, 2018 11:38 pm
Forum: Lewis Acids & Bases
Topic: Acid structure
Replies: 2
Views: 219

Re: Acid structure

Most times an acid will start with H and end in the COOH box, but that does not happen every time.
by Elana Weingord 1C
Sun Jun 10, 2018 11:37 pm
Forum: Hybridization
Topic: pi bonds and sigma bonds [ENDORSED]
Replies: 4
Views: 286

Re: pi bonds and sigma bonds [ENDORSED]

Every bond will have at least one sigma bond.
by Elana Weingord 1C
Sun Jun 10, 2018 11:34 pm
Forum: Lewis Acids & Bases
Topic: pH
Replies: 3
Views: 300

Re: pH

One of the UA's said that we need to be able to come up with an example pertaining to acids and bases but would not need to identify whether a specific example such as tomato juice is an acid or base.
by Elana Weingord 1C
Sun Jun 10, 2018 11:33 pm
Forum: SI Units, Unit Conversions
Topic: Sig Figs for Final
Replies: 8
Views: 442

Re: Sig Figs for Final

I believe that we need to know sig figs for the final.
by Elana Weingord 1C
Sun Jun 10, 2018 4:11 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: Strong or weak acids/ bases
Replies: 6
Views: 584

Re: Strong or weak acids/ bases

How do you know how well a base will ionize in water if you are just given the chemical formula?
by Elana Weingord 1C
Sun Jun 10, 2018 4:09 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 12.49
Replies: 3
Views: 233

Re: 12.49

I was confused on the same question. I do not know how to solve this without the pKB terms or the Kb terms.
by Elana Weingord 1C
Thu Jun 07, 2018 4:16 pm
Forum: Hybridization
Topic: Clarification
Replies: 4
Views: 256

Re: Clarification

yes, this is saying to apply the same concept to each one
by Elana Weingord 1C
Thu Jun 07, 2018 4:13 pm
Forum: Hybridization
Topic: Hybrid Orbitals
Replies: 3
Views: 234

Re: Hybrid Orbitals

I believe the correct way to write this is sp3d as that is how it is often written in lecture in the solutions manual of the textbook.
by Elana Weingord 1C
Thu Jun 07, 2018 4:10 pm
Forum: Bond Lengths & Energies
Topic: unit box
Replies: 3
Views: 245

Re: unit box

I believe this is a term he uses to explain the conversion ratios that need to be used.
by Elana Weingord 1C
Thu Jun 07, 2018 4:08 pm
Forum: Dipole Moments
Topic: dipole moments
Replies: 9
Views: 475

Re: dipole moments

Just to confirm - an increase in the difference between electronegativity will lead to a larger dipole?
by Elana Weingord 1C
Mon Jun 04, 2018 12:01 am
Forum: Lewis Structures
Topic: Central Atom(s)
Replies: 6
Views: 262

Re: Central Atom(s)

It is always the atom that is least electronegative
by Elana Weingord 1C
Mon Jun 04, 2018 12:00 am
Forum: Properties of Light
Topic: Memorizing formulas test 2
Replies: 16
Views: 724

Re: Memorizing formulas test 2

We do not have to have the formulas memorized for the test
by Elana Weingord 1C
Sun Jun 03, 2018 11:59 pm
Forum: Naming
Topic: Naming
Replies: 9
Views: 557

Re: Naming

Ion refers to a charged particle
by Elana Weingord 1C
Mon May 21, 2018 5:06 pm
Forum: Ionic & Covalent Bonds
Topic: Octet rule
Replies: 17
Views: 717

Re: Octet rule

What are the exceptions to the octet rule?
by Elana Weingord 1C
Sun May 13, 2018 1:17 pm
Forum: Trends in The Periodic Table
Topic: Electron Affinity Exceptions
Replies: 3
Views: 266

Re: Electron Affinity Exceptions

Yes we do need to know the exceptions for the exam. I believe that we only need to know the exceptions in relation to the first three rows of the periodic table and not all of it.
by Elana Weingord 1C
Sun May 13, 2018 1:16 pm
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Switching 3d and 4s
Replies: 6
Views: 380

Re: Switching 3d and 4s

The 4S orbital has higher energy than the 3D orbital, which is why you write it afterwards. Also, it is important to note that since the energy in the 4S orbital is higher, the electrons from that orbital will be removed before electrons in the 3D orbital are removed
by Elana Weingord 1C
Sun May 13, 2018 1:13 pm
Forum: *Shrodinger Equation
Topic: Schrodinger Equation [ENDORSED]
Replies: 8
Views: 473

Re: Schrodinger Equation [ENDORSED]

This can be applied to all atoms, not just Hydrogen atoms
by Elana Weingord 1C
Mon May 07, 2018 7:17 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect Module Question [ENDORSED]
Replies: 5
Views: 309

Re: Photoelectric Effect Module Question [ENDORSED]

Another question from this module:

"Model of light in the photoelectric effect needs to change from a ________ model to a ________ model."
by Elana Weingord 1C
Mon May 07, 2018 7:09 pm
Forum: Photoelectric Effect
Topic: Photoelectric Effect
Replies: 12
Views: 449

Re: Photoelectric Effect

What was the original purpose of the photoelectric effect? (module Q20)
by Elana Weingord 1C
Mon May 07, 2018 7:03 pm
Forum: Photoelectric Effect
Topic: Photoelectric Problems
Replies: 4
Views: 305

Re: Photoelectric Problems

Does the photoelectric effect have to occur in a vacuum?
by Elana Weingord 1C
Sun May 06, 2018 7:03 pm
Forum: Properties of Light
Topic: Wavelength/frequency
Replies: 11
Views: 514

Re: Wavelength/frequency

It is important to note that when the wavelength increases, the electro magnetic radiation's frequency decreases. Since energy of a photon is expressed through the formula E = hv, energy of the photon must decrease since frequency decreased.
by Elana Weingord 1C
Fri Apr 27, 2018 3:59 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Balmer and Lyman Series
Replies: 9
Views: 724

Re: Balmer and Lyman Series

Yes we need to know the different energy levels for the balmer (n=2) and lyman (n=1) series. I think that it is also important to know that there are only 7 different energy levels.
by Elana Weingord 1C
Fri Apr 27, 2018 3:57 pm
Forum: Photoelectric Effect
Topic: Work Function
Replies: 4
Views: 241

Re: Work Function

There could be a problem where you are given the light energy and the energy from the electrons and will have to find the work function.
by Elana Weingord 1C
Fri Apr 27, 2018 3:55 pm
Forum: Photoelectric Effect
Topic: Test 2 final question [ENDORSED]
Replies: 15
Views: 712

Re: Test 2 final question [ENDORSED]

there is always a one to one ration between the number of photons of light and the number of electrons that are ejected
by Elana Weingord 1C
Sat Apr 21, 2018 12:56 pm
Forum: Properties of Light
Topic: still don't uderrsatnd what a photon is [ENDORSED]
Replies: 20
Views: 499

Re: still don't uderrsatnd what a photon is [ENDORSED]

The best way to think of a photon is to think of it as light. It is important to note that a photon does not ever have any mass to it.
by Elana Weingord 1C
Sat Apr 21, 2018 12:48 pm
Forum: SI Units, Unit Conversions
Topic: Chemical Formulas [ENDORSED]
Replies: 11
Views: 472

Re: Chemical Formulas [ENDORSED]

My TA told me that we do not need to have the different formulas memorized, but need to know which formula is for electrons and which one is for a photon.
by Elana Weingord 1C
Sat Apr 21, 2018 12:44 pm
Forum: SI Units, Unit Conversions
Topic: Correct Units?? [ENDORSED]
Replies: 8
Views: 372

Re: Correct Units?? [ENDORSED]

As stated above, it is important to always follow the units that the problem gives you. It is also important to note that certain units such as joules are given in (kg(m^2))/s^2 and that the problem will not work if you use grams in it.
by Elana Weingord 1C
Thu Apr 12, 2018 12:35 pm
Forum: Balancing Chemical Reactions
Topic: Balancing equations with fractions [ENDORSED]
Replies: 13
Views: 586

Re: Balancing equations with fractions [ENDORSED]

It might be easier to begin with the mole ratios in fractions, but the final answer must be given in whole numbers. Using whole numbers is important because when converting atoms needed etc. it is easiest to use whole numbers in the conversions.
by Elana Weingord 1C
Thu Apr 12, 2018 12:33 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Which mass of oxygen should be used? [ENDORSED]
Replies: 23
Views: 1187

Re: Which mass of oxygen should be used? [ENDORSED]

I think that using 16 is also fine because it is close enough to the actual value. The TAs have said that they take into consideration rounding when grading the tests and exams.
by Elana Weingord 1C
Thu Apr 12, 2018 12:30 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Which mass of oxygen should be used? [ENDORSED]
Replies: 23
Views: 1187

Re: Which mass of oxygen should be used? [ENDORSED]

I think that using 16 is also fine because it is close enough to the actual value. The TAs have said that they take into consideration rounding when grading the tests and exams.
by Elana Weingord 1C
Thu Apr 12, 2018 12:28 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Using Precision and Accuracy to Solve A Problem
Replies: 3
Views: 221

Re: Using Precision and Accuracy to Solve A Problem

I think that it is also important to note that it is better to have high precision then high accuracy. This is because if you have high precision, then although your results will not be as accurate, you will be able to make changes to the way your experiment is run in order to eventually have high a...
by Elana Weingord 1C
Sun Apr 08, 2018 3:26 pm
Forum: Empirical & Molecular Formulas
Topic: Naming compounds
Replies: 4
Views: 214

Re: Naming compounds

I talked to my TA about this one and she said that as the quarter progresses, you will begin to identify certain compounds and know their names. She said that there will not be questions on any of the exams or quizzes asking you to name a compound. Hope that helps!
by Elana Weingord 1C
Sun Apr 08, 2018 3:23 pm
Forum: Significant Figures
Topic: Sig Figs for Hydrogen
Replies: 2
Views: 149

Re: Sig Figs for Hydrogen

I think that it is always best to leave the most amount of Significant Figures. It is a little bit of an annoyance, but can result in a more accurate answer.
by Elana Weingord 1C
Sun Apr 08, 2018 3:20 pm
Forum: Limiting Reactant Calculations
Topic: Reactant vs. Reagent [ENDORSED]
Replies: 23
Views: 13515

Re: Reactant vs. Reagent [ENDORSED]

I was under the impression that the two words mean the exact same thing and are synonyms of each other.

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